Sheet-metal pump-base.



H. E. SPENCER.

SHEET METAL PUMP BASE.

APPLICATION FILED FEB.24. 1917.

7, N m N g. M N m a a P q \N 6 9 0 N w L w INVENTOR A ITORIVEYS UNITED STATES PATENT OFFICE.

. HARRY E. SPENCER, OF NEW YORK, N. Y., ASSIGNOR TO ERNEST M. GULF, OF

PATERSON, NEW JERSEY.

SHEET-METAL PUMP-BASE.

Specification of Letters Patent.

Application filed February 24, 1917. Serial No. 150,701.

To all whom it may concern:

Be it known that I, HARRY E. Srnxcnn, av citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Sheet- Metal Pump-Bases, of which the following is a full, clear, and exact description.

This invention relates to improvements in air pumps, and more particularly to handoperated pumps for use in inflating pneumatic tires.

The object of this invention is to provide a simple and rigid sheet met-a1 pump base constructed so as to permit the permanent mounting thereon of the pump barrel and a discharge nozzle adapted for connection with the usual air hose, and having a bypass or exhaust passage connecting the lower end of the pump barrel with the discharge nozzle.

A further object of the invention is to provide a pump base of the character set forth comprising simple and easily constructed parts adapted to be stamped or pressed from sheet metal blanks and permanently connected together by welding or brazing.

In the drawings, Figure 1 is a top plan view of the pump base, showing the pump barrel and discharge nozzle mounted thereon;

Fig. 2 a vertical sectional View on the line IIII of Fig. 1;

Fig. 3 a similar view on the line lII-III of Fig. 1;

Fig. 4 a detail plan view of the plate forming the by-pass or exhaust passage between the cylinder and nozzle; and

Fig. 5 is a side elevation of the pump.

The pump base comprises a body part 1 of sheet metal having a depending flan e or rim 2 extending around the outer edges t lemof. The base 1 is substantially oblong and adjacent each end thereof a portion of the body part of the base is stamped or otherwise shaped to form apertures 3. bounded by depending flanges 4. The flanges 2 and 4 support the body part 1 above the floor or ground and also serve to brace and strengthen the sheet metal base.

The central portion of the body part 1 of the pump base is stamped out to form a circular aperture 5 and an upwardly extending annular flange 6. The lower'open end of the pump barrel 0r cylinder 7 fits within the annular Hann 6 and is m-eferablv nermanently connected therewith by welding or brazing.

The base 1 is cut away to form a circular aperture 8 adjacent the aperture 5 adapted to receive the lower end of a suitable discharge nozzle or nipple 9. The nipple 9 is preferably formed wit-h an annular flange 10 adjacent its lower end adapted to rest upon the upper surface of the base 1 and to be welded or brazed to the base to permanently secure the nipple to the base. The upper end of the nipple 9 is threaded or otherwise adapted for connection with the usual air hose employed with pumps of this type and a, suitable outwardly opening check valve may be mounted in the nipple, or in the end of the air hose, as preferred.

A plate 10 of sheet metal is welded or brazed to the under side of the base 1 so as to cover the apertures 5 and 8. The plate 10 is pressed or stamped to form a. depression 11 therein extending from a point below the aperture 5 to a point below the aperture 8 to form a by-pass or discharge passage 12 connecting the lower open end of the pump cylinder 7 with the lower end of the nipp Any suitable means may be provided for admit-ting 'a'ir beneath the pump piston on the upward movement thereof, such, for example, as an apertured cap at the upper end of the cylinder and a loosely fitting piston carrying a flexible inverted cup-shaped washer, such as is commonly employed in pumps of this type.

From the foregoing it will be observed that an exceedingly light and strong pump base is provided, comprising a few readily assembled parts adapted to be readily stamped, pressed, or otherwise formed from sheet metal.

An important feature of the invention is the construction and arrangement of parts whereby the discharge nozzle may be mounted on the base and connected with the lower end of the pump barrel. thus permitting the use of a sheet metal base on a pump in which air is discharged from the lower end of the pump barrel on the down stroke of the piston, without the necessity of employing two telescoping pump cylinders, or other comparatively complicated mechanism. such as heretofore used.

It will also be observed that the depending mar inal flanges and the depending Patented Jan. 7, 1919.

-- an elevated position to enable the plate 10,

I under side of the base plate.

flanges 4 at each side of the pump barrel socket serve to support the base plate 1 in metal body member having a depending marginal flange and also having apertures adapted to communicate with the pump cylinder and discharge nozzle, and ametal plate member secured to the under side of the body member and extending across both of said apertures, one of said members having a pressed-up portion forming with the other member a passage connecting said apertures with each other. i

2. A base for pumps comprising a sheet metal body member having a depending marginal flange and also having apertures adapted to communicate with the pump cylinder and discharge nozzle, and ametal plate member secured to the under side of the body member and extending across both said apertures, said plate member having a pressed-up portion extending from one to the other of said apertures and forming with the body member a passage connecting said apertures with each other.

3. A base for pumps comprising a sheet metal body ntember having a depending marginal flange and also having apertures adapted to communicate with the pump cylinder and discharge nozzle, said member also having openings between which said apertures are located and a depending supporting flange around the margin of each such opening, and a metal plate member secured to the under side of the body member and extending across both said apertures, said members having between them a by-pass connecting said apertures with each other.

4. A sheet metal base for pumps comprising a. body part having a depending marginal flange and a centrally arranged aperture, an integral upwardly extending annular flange surrounding said aperture adapted to receive the lower open end of the pump cylinder, a nipple secured to said body part and having its lower end. seated in a second aperture in the body part, and a metal plate secured to the under side of the body part and extending across both of said apertures, said plate having a channel therein communicating with both of said apertures.

In testimony whereof I hereunto afiix my signature.

HARRY E. SPENCER. 

